Determining the optimal reduction ratio in temper rolling in terms of residual stress distribution across thickness
Öz
Materials with compressive stresses on the surface withstand fatigue failures, cracking, galling, and corrosion. This compressive stress at the surface can be created by temper rolling. The rolling process must be conducted with an appropriate reduction to obtain the desired benefit from temper rolling. A 1% thickness reduction is usually applied to endow flatness and surface texture to the strip, and this reduction is sufficient to eliminate the discontinuous yielding phenomenon. In this study, 2.5-mm-thick low-carbon steel sheet (DC01 grade) samples were annealed at approximately 600°C for 5 minutes, temper-rolled at room temperature at various reduction ratios subsequently, and the residual stresses formed along the thickness by rolling were investigated. This study has revealed that a 1% reduction ratio is insufficient for developing compressive stresses on the surface, but this can only be achieved with a 1.5% reduction ratio. When the reduction ratio was increased to 1.8%, tensile stresses began to occur inside, along with compressive stresses on the surface. It was observed that at a reduction ratio of 2%, the situation was reversed again; tensile stresses began to regenerate at the surface, and this became more pronounced up to a 10% reduction ratio.
Anahtar Kelimeler
Compressive and tensile stresses, Discontinuous (obvious) yield phenomenon, Reduction ratio (Thickness reduction), Temper (Skin-pass) rolling
Destekleyen Kurum
KARABÜK ÜNİVERSİTESİ
Proje Numarası
KBÜBAP-23-DS-043
Teşekkür
Malzeme tedarik sürecinde katkı sağlayan Çınar Çelik Servis Merkezi'ne teşekkür ederiz.
Kaynakça
- Ali, M. Y., & Pan, J. (2012). Effect of a deformable roller on residual stress distribution for elastic-plastic flat plate rolling under plane strain conditions. SAE International Journal of Materials and Manufacturing, 5(1), 129–142. https://doi.org/10.4271/2012-01-0190
- Azarhoushang, B., & Kadivar, M. (2021). Thermal aspects of abrasive machining processes. Tribology and Fundamentals of Abrasive Machining Processes: Third Edition. Elsevier Inc. https://doi.org/10.1016/B978-0-12-823777-9.00008-2
- Çolak, B. (2021). How the skin-pass rolling reduction ratio affects the strain aging behaviour of low-carbon steel sheets. Ironmaking and Steelmaking, 48(10), 1254–1260. https://doi.org/10.1080/03019233.2021.1936877
- Çolak, B., & Kurgan, N. (2018). An experimental investigation into roughness transfer in skin-pass rolling of steel strips. International Journal of Advanced Manufacturing Technology, 96(9–12), 3321–3330. https://doi.org/10.1007/s00170-018-1691-9
- Çolak, B., & Kurgan, N. (2019). Skin-pass rolling of sheet steel. The International Conference on Material Science and Technology (IMSTEC) (K. Bülent (ed.); pp. 207–212).
- Fang, X., Fan, Z., Ralph, B., Evans, P., & Underhill, R. (2002). Effect of temper rolling on tensile properties of C-Mn steels. Materials Science and Technology, 18(3), 285–288. https://doi.org/10.1179/026708301225000734
- Grassino, J., Vedani, M., Vimercati, G., & Zanella, G. (2012). Effects of skin pass rolling parameters on mechanical properties of steels. International Journal of Precision Engineering and Manufacturing, 13(11), 2017–2026. https://doi.org/10.1007/s12541-012-0266-1
- Jafarlou, D., Hassan, M., Mardi, N. A., & Zalnezhad, E. (2014). Influence of temper rolling on tensile property of low carbon steel sheets by application of Hill 48 anisotropic yield criterion. Procedia Engineering, 81(October), 1222–1227. https://doi.org/10.1016/j.proeng.2014.10.101
- Kalpakjian, S., & Schmid, S. (2007). Manufacturing processes for engineering materials (5th Edition). Pearson
- Kanchidurai, S., Krishanan, P. A., Baskar, K., & Saravana Raja Mohan, K. (2017). A review of inducing compressive residual stress - Shot peening; On structural metal and welded connection. IOP Conference Series: Earth and Environmental Science, 80(1), 0–11. https://doi.org/10.1088/1755-1315/80/1/012033